Valence Electrons
Bonding
The Periodic Table
Electron Dot Diagram
BONUS (Lesson 2-Covalent Bonds)
100
What are valence electrons?
Electrons that have the highest energy within an atom.
100
What is a chemical bond?
The force of attraction that holds atoms together as a result of the rearrangement of electrons between them.
100
What 3 groups is the periodic table split into?
- metals
- nonmetals
- metalloids
100
Boron (B)
100
What is an ion?
An atom or group of atoms that has an electric charge.
200
True or False?
The electrons of an atom are found at the same energy level.
False.
The electrons of an atom are found at different energy levels.
200
How many valence electrons allow for an atom to be stable?
8
200
The atomic number of an element is the # of _______ in each atom of that element.
Protons
200
Carbon (C)
200
True or False?
Ions that are made up of 1 atom is called polyatomic.
False.
Ions that are made up of more than 1 atom are called polyatomic.
**HINT: the prefix poly means "many"
300
Valence electrons are involved in what kind of bonding?
Chemical
300
True or False?
When atoms bond, valence electrons can be transferred from one atom to another or shared between atoms.
True!
300
True or False?
The number of valence electrons decreases from left to right across a period.
False.
The number of valence electrons increases from left to right across a period.
300
Neon (Ne)
300
True or False?
In an ionic compound, the total positive charge of all the positive ions is greater than the total negative charge of all the negative ions.
False.
In an ionic compound, the total positive charge of all the positive ions is equal to the total negative charge of all the negative ions.
400
True or False?
Electrons at higher energy levels have higher amounts of energy.
True!
400
True or False?
Hydrogen needs only 3 valence electrons to be stable.
False.
Hydrogen needs only 2 valence electrons to be stable.
400
The elements in the periodic table are in order by increasing __________ __________.
Atomic Number
400
Phosphorus (P)
400
What is an ionic bond?
The attraction between two oppositely charged ions.
500
The number of valence electrons in each atom helps determine the _________ _________ of that element.
Chemical Properties
500
Name an example of an atom that has 8 valence electrons.
- Neon (Ne)
- Argon (Ar)
- Krypton (Kr)
- Xenon (Xe)
500
What would happen if an alkali metal was combined with a halogen?
The alkali metal would give up an electron to the halogen.
500
Chlorine (Cl)
500
Your Pick!
When a neutral atom loses a valence electron, it loses a negative charge. It becomes a POSITIVE/NEGATIVE ion.
When a neutral atom gains an electron, it gains a negative charge. It becomes a POSITIVE/NEGATIVE ion.
When a neutral atom loses a valence electron, it loses a negative charge. It becomes a POSITIVE ion.
When a neutral atom gains an electron, it gains a negative charge. It becomes a NEGATIVE ion.